We’ve featured videos from Flora Lichtman and Sharon Shatttuck’s Animated Life series for the New York Timesbefore. The subject this time is paleoanthropologist Mary Leakey, with a particular focus on her discovery of the Laetoli footprints, which showed how hominids walked upright 3.5 million years ago.

In addition to covering the science, the video contains anecdotes from people who knew Leakey. Unsurprisingly, they all remember her as a truly dedicated and competent scientist.